Named tags are very useful when you want to save specific details for products under tags with a specific pattern. (e.g. Material_Cotton, Material_Leather, Under-500). You can configure as many tags as you want under this section where each field represents as follows.
For Example: If we take Material_Leather as a Named Tag, it will have the following values.
Name: Leather Material (You can have any other custom name according to your requirement)
Identifier: Material (Here, the word Material is an identifier that can vary according to the Named Tag being added)
Separator: _ (Underscore is the separator in this case. It can be anything else as well like, a hyphen, slash, etc. depending on the Named Tag)
Type: String (Here you need to specify the type of the tag that you’re adding which needs to be either String, Boolean, Number, or URL Encoded)
Is Searchable: Yes (You can either choose Yes if you want to make the value of the tag searchable or else No)
Is Filterable: Yes (You can either choose Yes if you want the Named Tag to appear in the Filters or else No)
For each Named Tag, you can select a Value Rule where you can either select to consider the Named Tags you might have added or to Ignore them, according to your need.
In case a row in the configuration block is added by mistake or you no longer need it then you can delete it from the delete button.